public class StackTraceDemo{
	public static void main(String[] args){
		try{
			c();
		}catch(NullPointerExpection ex){
			ex.printStackTrace();
		}
	}
	static void c(){
		b();
	}
	static void b(){
		a()
	}
	static String a(){
		String text = null;
		return textToupperCase();
	}
}

